Webster's Revised Unabridged Dictionary · 1913

Nineteen

Nineteen , adjective

[Anglo-Saxon nigontȳne, nigontēne. See Nine, and Ten.]

Nine and ten; eighteen and one more; one less than twenty; as, nineteen months.

Nineteen , noun

1.
The number greater than eighteen by a unit; the sum of ten and nine; nineteen units or objects.
2.
A symbol for nineteen units, as 19 or xix.